Boudewijn Zenden (born August 15, 1976 in Maastricht) is a Dutch football (soccer) left midfielder and defender, who currently plays for Middlesbrough in the English Premiership.

Prior to joining Boro, Zenden played for PSV Eindhoven (1994-98), Barcelona (1998-2001), and Chelsea (2001-03). In March 2004, he scored the game winner in the League Cup final against Bolton Wanderers to give Middlesbrough their first major trophy. Zenden has earned 40 caps for the Dutch national team (as of the end of 2004), and played for his country in the 1998 World Cup, Euro 2000 and Euro 2004.